Drainage tile



June 16, 1925.

J. W. BRENNAN DRAINAGE TILE Filed April 27, 1923 Patented Julie 16,1925.

UNITED STATES JOHN W. BRENNAN, OF DENVER, COLORADO.

DRAINAGE TILE.

Application filed April 27, 1923. Serial No. 685,057.

tion.

This invention relates to tile of the type .used for the purpose ofdraining off surplus soil moisture and has for its principal object theprovision of a tile of this character, which can be cheaply and easilymanufactured and which will present a minimum of resistance to theentrance of drainage water and prevent soil, sand and other foreignmaterial from entering the tile.

A further object of the invention is to so shape the tile that it can bequickly and cheaply installed in the ground and so that it will besupported at the joints to prevent the twisting and buckling due to softmarshy ground.

A still further object is to form a drainage tile in which it will beunnecessar to core or punch holes in the walls thereo for the entranceof the drainage water.

Other objects and advantages reside in .the detail construction of theinvention,

which results in simplicity, economy and efficiency, and which willbecome more apparent from the following description.

In the following detailed description of the invention reference is badto the accompanying drawing which forms a part hereof. Like numeralsrefer to like parts in all views of the drawing and throughout thedescription.

In this drawing:

Fig. 1 is a fragmentary perspective view of several lengths of theimproved tile as they would appear when installed.

Fig. 2 is a cross sectional view of the improved tile as it would appearin use, the section being taken intermediate the supporting blocks.

Fig 3 is a vertical longitudinal section through an alternate form ofthe invention.

The invention comprises, a semi-cylindrical top section 10; asemi-cylindrical bottom section 11, of smaller diameter than section 10'and jointsuppor'ting blocks 12.

" ttom sectionjll rests, at its extremities,

in a semi-circular groove 13 in each of the blocks 12, the o n side ofthe section facing upward. I mp section 10 also rests at its extremitiesupon the blocks 12 with its open side facin downward.

Owing to the differing diameters of the sections 10 and 11, a drainageopening 14 is left at each side extendin throughout the length of thetile. It willie noted that the longitudinal edges of the sections 10 and11 overlap, as shown in Fig. 2.

The drainage water enters the tile through the openings 14, where itrises in a vertical column owing to the overlapped edges, and flows intothe lower section 11 where it is carried off. Since the water must risein the openings 14, in order to flow over the edges of the section 11,the tendency to wash soil and other foreign substances into the tile isreduced to a minimum.

Spacers 15, are formed on the blocks 12 to center the upper section 10over the lower section 11 and keep the openings 14 of even width.

In Figs. 1 and 2, the sections 10 and 11 are shown as plain hollow halfcylinders, without projections or holes of any kind; the blocks 12 beingentirely separate from the sections. This is perhaps the most economicalform of the invention and has been found by actual experience to beentirely satisfactory. If desired, however, bells 16, as shown in Fig.3, might be formed on one extremity of each of the sections 10, tooverlap the end of the adjacent section. This form, while possibly moreexpensive to manufacture, would insure a tighter joint between thesections 10.

Should it be desired, the blocks 12 might be moulded integrally with andupon one end of each of the sections 11, as shown in Fig. 3. This formwould reduce the number of parts to the device and would chmen the costof installation.

ile a specific form of the improvement has been described andillustrated herein, it is desired understood that'the same may bevaried, within the scope of the appended claims, without departing fromthe spirit of the invention.

Havi thus described the invention, what is c aimed and desired securedby Let. ters Patent is 1. A hollow drainage tile, com rising incombination, an upper semi-cylin rical section; a lower semi-cylindricalsection coacting with and of less diameter than said upper section, theedges of said coacting sections overlapping; a longitudinal openingbetween said overlapped edges and blocks arranged to support both saidupper and lower sections and holding said sections in spaced relationand out of contact with each other.

2. A hollow drainage tile com rising in combination, an upper semi-cylinrical section; a lower seml-cylindrical section coacting with and ofless diameter than said upper section and blocks for supporting bothsaid sections out of contact with each other, said blocks beingsubstantially flat on the bottom and having a semi-circular groove forthe reception of said lower section.

3. A hollow drainage tile comprising in combination, an uppersemi-cylindrical section; a lower semi-cylindrical section 00- actingwith and of less diameter than said upper section and blocks forsupporting both said sections out of contact with each other, saidblocks being substantially flat on the bottom and having asemi-circulargroove for the reception of said lower section, and having upwardprojecting lugs adapted to pass between said upper and lower sections.

4. A hollow drainage tile comprising in combination an uppersemi-cylindrical section and a lower semi-cylindrical section coactingwith it and of less diameter than said upper section, said upper sectionbeing provided at its one extremity with a bell for the reception ofanother section, said lower section being provided at its one extremitywith a substantially rectangular block for the support of said section.

5. A hollow drainage tile comprising in combination an uppersemi-cylindrical section and a lower semi-cylindrical section coactingwith it and of less diameter than said upper section, said upper sectionbeing provided at its one extremity with a bell for the reception ofanother section, said lower section being provided at its one extremitywith a substantlally rectangular block for the support of said section,said block being recessed for the reception of the next adjoining lowersection, and having upward projecting lugs which contact with the innersurface of said upper section.

6. In a drainage tile thecombination of an upper invertedsemi-cylindrical trough; a lower semi-cylindrical trough of lessdiameter than said upper trough and substantially rectangular blocksprovided with a semi-circular depression for the reception of said lowertrough and with projecting shoulders for the reception of the edges ofsaid upper trough.

7. support for drainage tile of the type comprising two co-actin troughsof difiering size, one to act as a lid for the other, comprising a flatbottomed block provided with a depression for the reception of the lowerof said troughs and shoulders adapted to support the upper of saidtroughs out of contact with the lower.

8. A support for drainage tile of the type comprising two co-actingtroughs of difli'ering size, one to act as a lid for the other,comprising a flat bottomed block provided with a depression for thereception of the lower of said troughs; shoulders adapted to support theupper of said trou hs and lugs carried by said shoulders for olding saidupper and lower troughs in lo itudinal alignment and out of contact witheach JOHN W. BRENNAN.

